Take your pick

I suggested a while ago that politicians ought to be more willing to change their views in the face of new evidence, and should be more frank about having done so. A reader comments with an aphorism I wish I’d said (and probably will):

There are only three types of people who maintain complete consistency on complex subjects in the face of changing evidence: the stupid, the dishonest, and the insane. We require our politicians to be one of the three.